66360401189 has 2 divisors, whose sum is σ = 66360401190. Its totient is φ = 66360401188.

The previous prime is 66360401137. The next prime is 66360401273. The reversal of 66360401189 is 98110406366.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65865116164 + 495285025 = 256642^2 + 22255^2 .

It is a cyclic number.

It is not a de Polignac number, because 66360401189 - 2⁸ = 66360400933 is a prime.

It is a super-2 number, since 2×66360401189² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66360401489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33180200594 + 33180200595.

It is an arithmetic number, because the mean of its divisors is an integer number (33180200595).

Almost surely, 2^66360401189 is an apocalyptic number.

It is an amenable number.

66360401189 is a deficient number, since it is larger than the sum of its proper divisors (1).

66360401189 is an equidigital number, since it uses as much as digits as its factorization.

66360401189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 66360401189 in words is "sixty-six billion, three hundred sixty million, four hundred one thousand, one hundred eighty-nine".